Öglun­da caves are loca­ted along the path in Jät­ta­da­len, near wes­tern Billingen.

The Öglun­da caves were for­med under­ne­ath mas­si­ve fal­len sto­ne blocks, and the­re are also free-stan­ding pil­lars of dole­ri­te. The­se types of hol­lows, caves and pil­lars can be found all along the dole­ri­te slo­pes around Billingen.

Dole­ri­te is an igne­ous rock, which means that it was cre­a­ted from mag­ma from bene­ath the Earth’s crust. Around 300 mil­li­on years, mag­ma for­ced its way up through cracks in the sur­rounding host­rocks. When the hot mag­ma coo­led and soli­di­fi­ed as dole­ri­te, it crac­ked, usu­al­ly for­ming hex­a­go­nal pil­lars, but also for­ming much long­er cracks. This is what gave rise to the distin­cti­ve appea­ran­ce of the mountain slo­pes, with their pil­lars, clefts, hol­lows and caves.

Remem­ber that this is hazar­dous ter­rain, so keep a clo­se eye on child­ren and keep dogs on a leash!

Hit­ta Hit